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Astronomy Powerpoint
Astronomy Powerpoint

... releasing a tremendous amount of energy. • During nuclear fusion, energy is released because some matter is actually converted to energy. • It is thought that a star the size of the sun can exist in its present stable state for 10 billion years. As the sun is already 4.5 billion years old, it is “mi ...
Space_Review_Coelho
Space_Review_Coelho

... planet is from the sun – shorter their year; farther away a planet is from the sun – longer year year. ...
ISSUE 45 September 2011 - Bristol Astronomical Society
ISSUE 45 September 2011 - Bristol Astronomical Society

... succeed on another. If you are imaging during the daytime, then it is possible to get such images through a conventional zoom lens, or a lens with a long focal length. Before buying a telescope, I used a superb Tamron 300mm f2.8 lens (extended to 420mm with a 1.4x converter), and this I loaded with ...
Testing - Chabot College
Testing - Chabot College

... — They developed models of nature and emphasized that the predictions of models should agree with observations. • How did the Greeks explain planetary motion? — The Ptolemaic model had each planet move on a small circle whose center moves around Earth on a larger circle. ...
Document
Document

... — They developed models of nature and emphasized that the predictions of models should agree with observations. • How did the Greeks explain planetary motion? — The Ptolemaic model had each planet move on a small circle whose center moves around Earth on a larger circle. ...
Improving the Gaia planet catch by combining the astrometry with
Improving the Gaia planet catch by combining the astrometry with

... number of measurements, due to its specific scanning law (described in [6]). The number of observations of a given star depends mostly on the ecliptic latitude (number of measurements varying from 70 to more than 200). We did not consider the dependence on ecliptic longitude as it is dependent on th ...
Robotics - UNL CSE
Robotics - UNL CSE

... where detailed analysis is performed. The data are then returned back to the Data Management Center to be filed away. This process usually takes four months. A planet at an earth-like distance from its star is in the stars habitable zone, where temperatures are just right for liquid water to not fre ...
No Slide Title
No Slide Title

... – Stars like the Sun are billions of times brighter than planets – Planets and stars lie very close together on the sky • At 10pc Jupiter and the Sun are separated by 0.5” ...
WORD - hrsbstaff.ednet.ns.ca
WORD - hrsbstaff.ednet.ns.ca

... (d) Neptune, Uranus, Sol, Jupiter 35. What are the four Jovian Planets? (a) Saturn, Neptune, Jupiter, Uranus (b) Mars, Ceres, Mercury, Saturn (c) Uranus, Mercury, Mars, Neptune (d) Charon, Neptune, Uranus, Mars 36. What is another name for an interstellar gas cloud? (a) Nebula (b) Coma (c) Corona (d ...
Earth moves faster in its orbit.
Earth moves faster in its orbit.

... Copernicus’s important contribution to astronomy was a) proving planets move around the Sun in elliptical orbits. b) the theory of gravity. c) proposing a model that easily explained the retrograde motions of the planets. d) discovering the Sun was not at the center of the Milky Way. e) discovering ...
New science on the young sun, and Earth migration
New science on the young sun, and Earth migration

... in which Earth, Venus, and the moon are found. In the case of Venus, after the collision, there would undoubtedly be some gas and dust present around the region of Venus’s orbit and this could have a rounding effect on the orbit of the reformed Venus. On the other hand, this material might dissipate ...
Earth Science Quarter 1 Credit Recovery
Earth Science Quarter 1 Credit Recovery

... How did planets form from smaller masses such as planetesimals and protoplanets? A protoplanet is created when many asteroids collide together and create a sphere with a molten core. Planetesimals are the many small pieces of asteroid that combine to make the protoplanet. ...
Scientific Results Summary
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... was NASA’s Deep Impact Mission. Subaru and many other telescopes on Mauna Kea participated in the once-in-a-lifetime spectacle. On July 4th, a space probe impacted comet 9P/Tempel 1 with a huge chunk of copper traveling at 23,000 miles per hour. This was done to break up the comet’s crusty surface t ...
Apr 2017 - Bays Mountain Park
Apr 2017 - Bays Mountain Park

... would make it naked-eye visible under dark skies. Obviously, comets are very unpredictable, so it could go either way. This comet has had outbursts in the past, however, so we could be in for a real show. In 1973, the surface of the comet cracked and ...
Rocky Planets Gas Giants
Rocky Planets Gas Giants

... a comet with material at its surface. The scientists expected that a comet's center would look different from its surface. That's because comets probably formed at the same time as the solar system, so the material at the center has probably remained unchanged for just as long. The surface material, ...
A R T I C L E S
A R T I C L E S

... contains about two-thirds of the planetary mass of the solar system. Its elemental composition is thought to resemble that of the sun, but its structure is neither that of a star nor that of an inner planet. It is one-andone third times as dense as water, presumably composed mostly of gas and liquid ...
Wazzat Mean - Peterborough Astronomical Association
Wazzat Mean - Peterborough Astronomical Association

... The angular distance the Moon or a planet is from the Sun. The inner planets of Mercury and Venus are best seen when at maximum elongation, and thus are highest above the horizon before sunrise or after sunset. Ephemeris A timetable with celestial coordinates that indicates where a planet, comet, or ...
Motion of Objects in Space
Motion of Objects in Space

... Bell Ringer- Write definition and term 1. Any large body (bigger than asteroid) that revolves around a star 2. Giant ball of burning gas held together by gravity 3. Rocky object that orbits sun and is smaller than asteroid 4. Small chunk of ice, dust, and rocky material 5. A piece of space rock that ...
new mercury - stmarysroom52010
new mercury - stmarysroom52010

... A new mission of the Bepi Colombo is due to launch between 2010 and 2012; the mission will consist of two identical orbiters and for the first time possibly a launcher. ...
Branches of Astronomy
Branches of Astronomy

... don’t realize though, is that these images also yield volumes of information about the structure, nature and evolution of objects in our Universe. 2. Non-optical Astronomy: While optical telescopes are sometimes considered the only pure instruments for doing astronomy research, there are other types ...
Astronomy 101 Course Review and Summary
Astronomy 101 Course Review and Summary

... Oort cloud, far from the Sun. Comets with short orbital periods come from the Kuiper belt, 30-50 A.U. from the Sun. We know the Kuiper belt is full of icy ...
Basic Information about the Solar System Handout
Basic Information about the Solar System Handout

... worlds. Most are relatively nearby, within 5,000 light years, although one candidate was discovered in September 2005 via "microlensing" at a distance of 17,000 light years. Our whole solar system, along with all the local stars you can see on a clear dark night, reside in one of our galaxy's spiral ...
Presentation
Presentation

... • What is a theory in science? • A model that explains a wide variety of observations in terms of just a few general principles, which has survived numerous tests to verify its predictions and explanations. • How were astronomy and astrology related in the past, and are they still related today? • A ...
The Sidereal Messenger - UB
The Sidereal Messenger - UB

... although it might be expected that some would be found near the edge as well as elsewhere; it seems credible that there are spots there, but that they cannot be seen because they are hidden by a mass of atmosphere too thick and too bright for the sight to penetrate. I think it has been sufficiently ...
File - Mr. Gray`s Class
File - Mr. Gray`s Class

... night sky. This is called Prograde motion. – Sometimes planets appear to begin moving “backward” or eastward across the night sky. This is called Retrograde motion.  Please not that if you look these words up, the directions will be backwards because Astronomers pretend like you are living on the p ...
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IAU definition of planet



The definition of planet set in Prague in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body which: is in orbit around the Sun, has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and has ""cleared the neighborhood"" around its orbit.A non-satellite body fulfilling only the first two of these criteria is classified as a ""dwarf planet"". According to the IAU, ""planets and dwarf planets are two distinct classes of objects"". A non-satellite body fulfilling only the first criterion is termed a ""small Solar System body"" (SSSB). Initial drafts planned to include dwarf planets as a subcategory of planets, but because this could potentially have led to the addition of several dozens of planets into the Solar System, this draft was eventually dropped. The definition was a controversial one and has drawn both support and criticism from different astronomers, but has remained in use.According to this definition, there are eight planets in the Solar System. The definition distinguishes planets from smaller bodies and is not useful outside the Solar System, where smaller bodies cannot be found yet. Extrasolar planets, or exoplanets, are covered separately under a complementary 2003 draft guideline for the definition of planets, which distinguishes them from dwarf stars, which are larger.
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